Abstract
PTFE-bonded carbon electrodes have been used successfully in alkaline and acidic fuel cell electrodes and as hydrogen depolarizing electrodes in chlor-alkaline systems. Multi-layered thin carbon electrodes can be produced by several manufacturing techniques: pressing, rolling and spraying methods can be applied. In all cases it is important that an optimal design of the diffusion-and working zone is achieved. Acetylene blacks, furnace blacks and graphites are used as carbon materials, mixed with PTFE and filler materials and evaluated in laboratory cells, before they are built into larger stacks. Compositions of the different mixtures for the fabrication of the electrodes are given and the construction of bipolar cells is discussed. The bipolar cell design is simple for mass production and the resulting fuel cell batteries should be of low cost.
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